ElasticSearch使用（一）

1、Windows系统双击elasticsearch.bat打开服务

2、如果想使用head插件，到head插件路径下，先输入npm install -g grunt -cli，再输入npm install，最后输入grunt server

3、浏览器输入http://localhost:9100/，再到下面输入http://localhost:9200/即可连接

4、如果不使用head插件，使用postman也可以

5、不管是head插件还是postman查询使用起来都有异曲同工之妙

6、postman写入删除举例

7、postman查询举例

8、head插件查询举例

9、 Springboot整合ES方式（一）

到start.spring.io上快速构建一个项目，包含有Spring Web和Spring Data ElasticSearch
根据需要修改Springboot配置文件，如我的elasticsearch.yml里面改了集群名所以
创建一个实体类，实现Serializable接口，并使用@Document注解，字段一定要有一个id主键，可以定义对字段定义搜索规则

package me.lpzz.es.entity;

import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;
import org.springframework.data.elasticsearch.annotations.Field;
import org.springframework.data.elasticsearch.annotations.FieldType;

import java.io.Serializable;

@Document(indexName = "essay",type = "_doc")
public class Essay implements Serializable {

    /**主键*/
    @Id
    @Field(type = FieldType.Integer)
    private Integer id;

    /**文章标题*/
    @Field(type= FieldType.Text,analyzer = "ik_max_word",searchAnalyzer = "ik_smart")
    private String title;
    /**文章内容*/
    @Field(type= FieldType.Text,analyzer = "ik_max_word",searchAnalyzer = "ik_smart")
    private String content;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

定义接口，一定带有@Repository注解，并且继承ElasticsearchRepository，泛型里面是索引和主键数据类型

package me.lpzz.es.dao;

import me.lpzz.es.entity.Essay;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface EssayRepository extends ElasticsearchRepository<Essay,Integer> {
}

测试

package me.lpzz.es;

import me.lpzz.es.dao.EssayRepository;
import me.lpzz.es.entity.Essay;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.QueryStringQueryBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.elasticsearch.core.ElasticsearchTemplate;
import org.springframework.data.elasticsearch.core.query.NativeSearchQueryBuilder;
import org.springframework.data.elasticsearch.core.query.SearchQuery;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
@ContextConfiguration(classes = EsApplication.class)
public class EsTest {
    @Autowired
    private EssayRepository essayRepository;
    @Autowired
    private ElasticsearchTemplate elasticsearchTemplate;

    @Test
    public void testInsert(){
        Essay essay=new Essay();
        essay.setId(1);
        essay.setTitle("土巴兔装修1");
        essay.setContent("装修就上土巴兔");
        essayRepository.save(essay);
        essay.setId(2);
        essay.setTitle("土巴兔招聘2");
        essay.setContent("Java实习");
        essayRepository.save(essay);

    }
    @Test
    public void testInsertAll(){
        List<Essay> list=new ArrayList<>();
        Essay essay=new Essay();
        essay.setId(3);
        essay.setTitle("土巴兔技术研发部3");
        essay.setContent("当你感到不舒服的时候，就是你成长的时候3");
        list.add(essay);
        essay.setId(4);
        essay.setTitle("土巴兔技术研发部4");
        essay.setContent("当你感到不舒服的时候，就是你成长的时候4");
        list.add(essay);
        essayRepository.saveAll(list);
    }

    @Test
    public void testUpdate(){
        Essay essay=new Essay();
        essay.setId(3);
        essay.setTitle("土巴兔技术研发部3");
        essay.setContent("我在覆盖更新");
        essayRepository.save(essay);
    }

    @Test
    public void testDelete(){
        essayRepository.deleteById(4);
    }


    public void testDeleteAll(){
        essayRepository.deleteAll();//删除所有，风险较高
    }

    @Test
    public void testSearch(){
        //多条件分页高亮
        SearchQuery searchQuery=  new NativeSearchQueryBuilder()
                .withQuery(QueryBuilders.multiMatchQuery("土巴兔","title","content"))
                //.withSort(SortBuilders.fieldSort("").order(SortOrder.DESC))
                .withPageable(PageRequest.of(0,10))
                .withHighlightFields(
                        new HighlightBuilder.Field("title").preTags("<em>").postTags("</em>"),
                        new HighlightBuilder.Field("content").preTags("<em>").postTags("</em>")
                )
                .build();

        Page<Essay> page=essayRepository.search(searchQuery);
        for (Essay s:page) {
            System.out.println("###"+s.getId()+s.getTitle()+s.getContent());
        }
    }

}

测试通过

ElasticSearch使用（一）

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